NBC host Jimmy Fallon took a slightly different tack on President’s Day, engaging in a fitness challenge with First Lady Michelle Obama for a good cause — mostly.

“The most important thing for the kids to learn is that it’s all about being active and having fun,” Fallon told Obama, who developed the Let’s Move initiative to get kids more involved in fitness. “It doesn’t matter if you won or if you lost, you know?”

“It matters,” she replied, drolly.

The First Lady, Fallon quickly learned, was playing for keeps in their best-of-five competition, from admonishing him over picking an all-blue unitard (“No way, Jimmy”) to enlisting the help of security guard “Harry” to get the edge in a game of tug-of-war.